A little more than a year ago the shoe store I used to work at made the switch over to chip and PIN readers. As more and more people updated their credit and debit cards to ones with chips, we had more and more of the following transactions.
Customer: Does this read chips?
Me (or anyone on register) : Yes, go ahead and insert in the glowing slot, please.
Many people would get it right but some would insert the card the wrong way or swipe it anyway even though I just told them if their card has a chip it must be inserted.
As it should, the machine then asks for the PIN regardless of if it's a credit or debit card. The customer then says some variation of,
Customer: What do I push for credit?/I don't know my PIN/I don't want to put in my PIN
Me: Sorry, but if it's asking for your PIN, with the chip readers you have to put it in. That's how it verifies the card.
Reeeeee But I don't want to, I could lose my information!/But they didn't give me one so I don't know it!/*attempts to swipe card*
It even got to a point where I actually researched exactly how the chip and PIN system worked so I could explain to people that their money and info were safe to attempt to put them at ease. This worked for some, but for others they either switched to cash, a card that didn't have a chip so the machine could prompt for a signature instead or demanded a manager who told them the same thing I or one of my coworkers already did.
In the beginning, after the change, we actually lost a few sales because people were unobservant or paranoid about the new technology. Eventually the readers were altered so that unless specified otherwise by that particular customer's bank or credit union, the chip would prompt for a signature or they could bypass the PIN by pressing Enter on the pad.
Some people still had cards that needed a PIN even for credit but they didn't know the PIN or refused to put it in, but luckily for them I learned that if you force the machine to "fail" by removing the card before the chip reads 3 times it allows the card to be slid normally where it prompts for a signature or allows you to bypass the PIN.
It was all very exhausting.